bought a YTA18542 last year and at the end of the year, had a problem with it pulling small hills. Went into this year and it failed to pull any hills. had it looked at by an authorized dealer and they replaced the drive belt and when I got done mowing, the whole drive system froze up. dealer had it for 8 weeks and they said that there was a large work sheet they had to fill out because it was in warranty. Got the mower back today and it's no better than before. I am totally disgusted with the mower and the service and wish someone at the factory would contact me and see what can be done to rectify the problem and get my mower working. based on the chart sent with the mower, none of my hills are over 15 degrees. I need resolution on this problem.